I installed new starter and Solenoid and the battery is fully charged. From the key it will not crank or even click but I can jump it at the solenoid and it cranks right up. What am I missing. all accessories work when I turn the key to on position. Thanks for any help
1992 F150 5.0

 

how are you jumping the solenoid, across the two large lugs, or from the small one to the battery post?

 

From the small wire

 

than the issue is either neutral safety switch, ignition switch, ignition actuator, or a broken wire between the ignition switch and solenoid.
only way now is to back trace with a volt meter.
auto transmission, or manual? if auto transmission, make sure it is actually in park. or try in neutral. when i see a no start on auto transmission, very first thing i do is move the shifter to neutral and try to start.

 

1i usually try the the neutral thing too. It didn't change things so I'm with you on the other options. Thank you very much for your help.